Human beings undergo amazing development in the 9 months of prenatal development. These images show an embryo at 30 days (about the size of a poppy seed), an embryo at 8 to 9 weeks (about the size of an olive), and a fetus at 5 months (about the size of a pomegranate).
CLAUDE EDELMANN/SCIENCE SOURCE
BIOPHOTO ASSOCIATES/SCIENCE SOURCE
JAMES STEVENSON/SCIENCE SOURCE
BIOPHOTO ASSOCIATES/SCIENCE SOURCE
JAMES STEVENSON/SCIENCE SOURCE